Entering films with 1960's Sink the Bismarck, British actor John Stride joined the ranks of reliable "authority" character players. He was kept busy in such productions as Stanley Kubrick's A Clockwork Orange (1971) (as Dad), Roman Polanski's MacBeth (1971) (as Ross), Juggernaut (1974), A Bridge too Far (1977) John Wayne's Brannigan (1975), Flash Gordon (1980) (as Zogi) and Chevy Chase's Oh Heavenly Dog (1984). In The Omen (1976), Stride enjoyed a few of that horror film's least harrowing moments in the role of a psychiatrist, while in the 1978 cartoon feature Lord of the Rings, Stride was heard but not seen as Treddan. John Stride's film roles were usually unstressed, but he was shown to better effect on the British TV series The Main Chance and The Wilde Alliance.